Configure Packet Buffer Protection Based on Latency

Configure packet buffer protection based on latency for traffic that is latency-sensitive.
Configure packet buffer protection based on latency and apply it to zones that have traffic consisting of protocols and applications that are latency-sensitive.
  1. Select
    Device
    Setup
    Session
    .
  2. Edit the Session Settings section and enable
    Packet Buffer Protection
    .
  3. Enable
    Buffering Latency Based
    .
  4. Enter the
    Latency Alert (milliseconds)
    threshold above which the firewall starts generating an Alert log event every minute; range is 1 to 20,000; default is 50.
  5. Enter the
    Latency Activate (milliseconds)
    threshold above which the firewall activates random early drop (RED) on incoming packets and starts generating an Activate log every 10 seconds; range is 1 to 20,000ms; default is 200ms.
  6. Enter the
    Latency Max Tolerate (milliseconds)
    threshold above which the firewall uses RED with close to 100% drop probability; range is 1 to 20,000ms; default is 500ms.
    If the current latency is a value between the
    Latency Activate
    threshold and the
    Latency Max Tolerate
    threshold, the firewall calculates the RED drop probability as follows: (current latency -
    Latency Activate
    threshold) / (
    Latency Max Tolerate
    threshold -
    Latency Activate
    threshold). For example, if the current latency is 300,
    Latency Activate
    is 200, and
    Latency Max Tolerate
    is 500, then (300-200)/(500-200) = 1/3, meaning the firewall uses approximately 33% RED drop probability.
  7. Configure the
    Block Hold Time
    and
    Block Duration
    as for Packet Buffer Protection based on utilization.
  8. Click
    OK
    .
  9. Enable the second layer of protection for each zone where you want packet buffer protection based on latency.
    1. Select
      Network
      Zones
      and select a zone.
    2. Enable
      Packet Buffer Protection
      .
  10. Commit
    .

Recommended For You